A novel fine code phase determination approach for a bandwidth limited snapshot GPS receiver

IEEE/ION Position Location and Navigation Symposium : [proceedings]. IEEE/ION Position Location and Navigation Symposium Pub Date : 2010-05-04 DOI:10.1109/PLANS.2010.5507176

R. Zheng, MoHan Chen, X. Ba, Jie Chen

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引用次数: 3

Abstract

A novel fine code phase determination approach is proposed based on the deduced autocorrelation formula of C/A code for bandlimited receivers. The approach is able to significantly improve the navigation fix accuracy for bandlimited snapshot GPS receivers. A simplified algorithm based on the Taylor expansion of the correlation formula is proposed as well to reduce the computational complexity. In addition, a modified circular correlation combined with frequency FFT acquisition engine optimized for snapshot receivers is proposed, which is suitable for the proposed fine code determination algorithm. It also utilizes a proposed “coarse capture & confirm” mechanism to suppress the correlation peak distortion as well as the false alarm probability. Simulations with data sampled from both simulator and real world show that the proposed approaches are able to significantly improve the positioning accuracy in complex environments such as urban canyons and indoors.

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带宽受限快照GPS接收机的一种新的细码相位确定方法

基于推导出的限带接收机C/A码自相关公式，提出了一种新的精细码相确定方法。该方法能够显著提高带宽受限快照GPS接收机的导航定位精度。为了降低计算复杂度，提出了一种基于相关公式泰勒展开的简化算法。此外，提出了一种改进的圆形相关结合频率FFT采集引擎优化的快照接收机，适用于所提出的细码确定算法。它还利用了一种提出的“粗捕获和确认”机制来抑制相关峰值失真和虚警概率。仿真结果表明，该方法能够显著提高城市峡谷和室内等复杂环境下的定位精度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IEEE/ION Position Location and Navigation Symposium : [proceedings]. IEEE/ION Position Location and Navigation Symposium

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